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Electricity does have mass, yes. Indeed, one of Einstein's 1905 papers, "On the Electrodynamics of Moving Bodies" specifically demonstrates this. A moving magnet becomes more massive due to its increase of energy, and this additional inertia causes its electric field to increase in strength as well. Hence E = mc^2. If you wished, with sufficiently accurate ...

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Here's my visual approach to answering your question: the "spherical electrical waves" that you're referring to are just a way to represent the wave crests of light. When considering the oscillating electric field component of the electromagnetic wave, the individual waves propagate through space symmetrically in all directions when being emitted from a ...

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You have to clearly define what you mean by hover. One definition is to exert enough downforce to keep you 1m above the ground and whatever sideways force is necessary to keep you above the same point of the ground. If that is your definition, you will stay above the same point of the ground. If you mean exerting enough downward force to counteract ...

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In cosmology, "flat" doesn't mean the opposite of "rough." It means the opposite of "curved in a global sense." The surface of a sphere is not flat, even if it is smooth, as the surface everywhere has positive curvature. A saddle has everywhere negative curvature. An uncurved plane is flat in the cosmological sense, even if it has some bumps and ripples on ...

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